[FFmpeg-trac] #3903(ffmpeg:new): Cutting video file with invalid start time does not warn and produces invalid file

[FFmpeg]

#3903: Cutting video file with invalid start time does not warn and produces
invalid file
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:
  ahthovaikied                       |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:  git-
             Keywords:               |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 Take a video file of length for example 10s.

 Run:
 {{{
 $ ffmpeg -i file.whatever -ss 10:00:00 -t 00:00:10 -map 0 -c:v copy -c:a
 copy -c:s copy -f matroska out.mkv
 }}}

 FFmpeg does not warn on the invalid length and produces and invalid output
 file (not recognized by ffprobe!).

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Ticket URL: <https://trac.ffmpeg.org/ticket/3903>
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